Sun products are designed for seamless integration into various environments. They are scalable solutions optimized for critical tasks. Be sure that Sun products represent the latest developments in computer industry to give you more power and strength.This product is an Express Slide Rail Kit. It fits in Sun Rack 900-38, Sun Rack 1000-38, Sun Rack 1000-42, or racks that have front-rear rail spacing between 610mm to 915mm, about 24-inches to about 36-inches.